1 /* 2 * Copyright (C) 2010 The Android Open Source Project 3 * Copyright (C) 2012-2014, The Linux Foundation. All rights reserved. 4 * 5 * Not a Contribution, Apache license notifications and license are 6 * retained for attribution purposes only. 7 8 * Licensed under the Apache License, Version 2.0 (the "License"); 9 * you may not use this file except in compliance with the License. 10 * You may obtain a copy of the License at 11 * 12 * http://www.apache.org/licenses/LICENSE-2.0 13 * 14 * Unless required by applicable law or agreed to in writing, software 15 * distributed under the License is distributed on an "AS IS" BASIS, 16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 17 * See the License for the specific language governing permissions and 18 * limitations under the License. 19 */ 20 21 #include <cutils/properties.h> 22 #include <utils/Log.h> 23 #include <fcntl.h> 24 #include <sys/ioctl.h> 25 #include <linux/msm_mdp.h> 26 #include <sys/resource.h> 27 #include <sys/prctl.h> 28 #include <poll.h> 29 #include "hwc_utils.h" 30 #include "hdmi.h" 31 #include "qd_utils.h" 32 #include "string.h" 33 #include "overlay.h" 34 #include <inttypes.h> 35 36 using namespace qdutils; 37 namespace qhwc { 38 39 #define HWC_VSYNC_THREAD_NAME "hwcVsyncThread" 40 #define PANEL_ON_STR "panel_power_on =" 41 #define ARRAY_LENGTH(array) (sizeof((array))/sizeof((array)[0])) 42 #define MAX_THERMAL_LEVEL 3 43 const int MAX_DATA = 64; 44 45 int hwc_vsync_control(hwc_context_t* ctx, int dpy, int enable) 46 { 47 int ret = 0; 48 if(!ctx->vstate.fakevsync && 49 ioctl(ctx->dpyAttr[dpy].fd, MSMFB_OVERLAY_VSYNC_CTRL, 50 &enable) < 0) { 51 ALOGE("%s: vsync control failed. Dpy=%d, enable=%d : %s", 52 __FUNCTION__, dpy, enable, strerror(errno)); 53 ret = -errno; 54 } 55 return ret; 56 } 57 58 static void handle_vsync_event(hwc_context_t* ctx, int dpy, char *data) 59 { 60 // extract timestamp 61 uint64_t timestamp = 0; 62 if (!strncmp(data, "VSYNC=", strlen("VSYNC="))) { 63 timestamp = strtoull(data + strlen("VSYNC="), NULL, 0); 64 } 65 // send timestamp to SurfaceFlinger 66 ALOGD_IF (ctx->vstate.debug, "%s: timestamp %" PRIu64" sent to SF for dpy=%d", 67 __FUNCTION__, timestamp, dpy); 68 ctx->proc->vsync(ctx->proc, dpy, timestamp); 69 } 70 71 static void handle_blank_event(hwc_context_t* ctx, int dpy, char *data) 72 { 73 if (!strncmp(data, PANEL_ON_STR, strlen(PANEL_ON_STR))) { 74 unsigned long int poweron = strtoul(data + strlen(PANEL_ON_STR), NULL, 0); 75 ALOGI("%s: dpy:%d panel power state: %ld", __FUNCTION__, dpy, poweron); 76 if (!ctx->mHDMIDisplay->isHDMIPrimaryDisplay()) { 77 ctx->dpyAttr[dpy].isActive = poweron ? true: false; 78 } 79 } 80 } 81 82 static void handle_thermal_event(hwc_context_t* ctx, int dpy, char *data) 83 { 84 // extract thermal level 85 uint64_t thermalLevel = 0; 86 if (!strncmp(data, "thermal_level=", strlen("thermal_level="))) { 87 thermalLevel = strtoull(data + strlen("thermal_level="), NULL, 0); 88 } 89 90 if (thermalLevel >= MAX_THERMAL_LEVEL) { 91 ALOGD("%s: dpy:%d thermal_level=%" PRIu64"",__FUNCTION__,dpy,thermalLevel); 92 ctx->mThermalBurstMode = true; 93 } else 94 ctx->mThermalBurstMode = false; 95 } 96 97 struct event { 98 const char* name; 99 void (*callback)(hwc_context_t* ctx, int dpy, char *data); 100 }; 101 102 struct event event_list[] = { 103 { "vsync_event", handle_vsync_event }, 104 { "show_blank_event", handle_blank_event }, 105 { "msm_fb_thermal_level", handle_thermal_event }, 106 }; 107 108 #define num_events ARRAY_LENGTH(event_list) 109 110 static void *vsync_loop(void *param) 111 { 112 hwc_context_t * ctx = reinterpret_cast<hwc_context_t *>(param); 113 114 char thread_name[64] = HWC_VSYNC_THREAD_NAME; 115 prctl(PR_SET_NAME, (unsigned long) &thread_name, 0, 0, 0); 116 setpriority(PRIO_PROCESS, 0, HAL_PRIORITY_URGENT_DISPLAY + 117 android::PRIORITY_MORE_FAVORABLE); 118 119 char vdata[MAX_DATA]; 120 //Number of physical displays 121 //We poll on all the nodes. 122 int num_displays = HWC_NUM_DISPLAY_TYPES - 1; 123 struct pollfd pfd[num_displays][num_events]; 124 125 char property[PROPERTY_VALUE_MAX]; 126 if(property_get("debug.hwc.fakevsync", property, NULL) > 0) { 127 if(atoi(property) == 1) 128 ctx->vstate.fakevsync = true; 129 } 130 131 char node_path[MAX_SYSFS_FILE_PATH]; 132 133 for (int dpy = HWC_DISPLAY_PRIMARY; dpy < num_displays; dpy++) { 134 for(size_t ev = 0; ev < num_events; ev++) { 135 snprintf(node_path, sizeof(node_path), 136 "/sys/class/graphics/fb%d/%s", 137 dpy == HWC_DISPLAY_PRIMARY ? 0 : 138 overlay::Overlay::getInstance()-> 139 getFbForDpy(HWC_DISPLAY_EXTERNAL), 140 event_list[ev].name); 141 142 ALOGI("%s: Reading event %zu for dpy %d from %s", __FUNCTION__, 143 ev, dpy, node_path); 144 pfd[dpy][ev].fd = open(node_path, O_RDONLY); 145 146 if (dpy == HWC_DISPLAY_PRIMARY && pfd[dpy][ev].fd < 0) { 147 // Make sure fb device is opened before starting 148 // this thread so this never happens. 149 ALOGE ("%s:unable to open event node for dpy=%d event=%zu, %s", 150 __FUNCTION__, dpy, ev, strerror(errno)); 151 if (ev == 0) { 152 ctx->vstate.fakevsync = true; 153 //XXX: Blank events don't work with fake vsync, 154 //but we shouldn't be running on fake vsync anyway. 155 break; 156 } 157 } 158 159 pread(pfd[dpy][ev].fd, vdata , MAX_DATA, 0); 160 if (pfd[dpy][ev].fd >= 0) 161 pfd[dpy][ev].events = POLLPRI | POLLERR; 162 } 163 } 164 165 if (LIKELY(!ctx->vstate.fakevsync)) { 166 do { 167 int err = poll(*pfd, (int)(num_displays * num_events), -1); 168 if(err > 0) { 169 for (int dpy = HWC_DISPLAY_PRIMARY; dpy < num_displays; dpy++) { 170 for(size_t ev = 0; ev < num_events; ev++) { 171 if (pfd[dpy][ev].revents & POLLPRI) { 172 ssize_t len = pread(pfd[dpy][ev].fd, vdata, MAX_DATA, 0); 173 if (UNLIKELY(len < 0)) { 174 // If the read was just interrupted - it is not 175 // a fatal error. Just continue in this case 176 ALOGE ("%s: Unable to read event:%zu for \ 177 dpy=%d : %s", 178 __FUNCTION__, ev, dpy, strerror(errno)); 179 continue; 180 } 181 event_list[ev].callback(ctx, dpy, vdata); 182 } 183 } 184 } 185 } else { 186 ALOGE("%s: poll failed errno: %s", __FUNCTION__, 187 strerror(errno)); 188 continue; 189 } 190 } while (true); 191 192 } else { 193 194 //Fake vsync is used only when set explicitly through a property or when 195 //the vsync timestamp node cannot be opened at bootup. There is no 196 //fallback to fake vsync from the true vsync loop, ever, as the 197 //condition can easily escape detection. 198 //Also, fake vsync is delivered only for the primary display. 199 do { 200 usleep(16666); 201 uint64_t timestamp = systemTime(); 202 ctx->proc->vsync(ctx->proc, HWC_DISPLAY_PRIMARY, timestamp); 203 204 } while (true); 205 } 206 207 for (int dpy = HWC_DISPLAY_PRIMARY; dpy <= HWC_DISPLAY_EXTERNAL; dpy++ ) { 208 for( size_t event = 0; event < num_events; event++) { 209 if(pfd[dpy][event].fd >= 0) 210 close (pfd[dpy][event].fd); 211 } 212 } 213 214 return NULL; 215 } 216 217 void init_vsync_thread(hwc_context_t* ctx) 218 { 219 int ret; 220 pthread_t vsync_thread; 221 ALOGI("Initializing VSYNC Thread"); 222 ret = pthread_create(&vsync_thread, NULL, vsync_loop, (void*) ctx); 223 if (ret) { 224 ALOGE("%s: failed to create %s: %s", __FUNCTION__, 225 HWC_VSYNC_THREAD_NAME, strerror(ret)); 226 } 227 } 228 229 }; //namespace 230
